Ordering number : ENN*6955 Monolithic Linear IC LA2351M 7.5 Mbps Automotive LAN Transceiver Preliminary Overview Package Dimensions The LA2351M is a low-noise transceiver for automotive LANs. unit: mm 3073C-MFP30SD Featrues [LA2351M] 15.2 0.65 1 Functions 16 7.9 30 10.5 • Implements 5 Mbps and 7.5 Mbps automotive LANs when used in conjunction with an automotive LAN protocol IC (ARCNET controller TMC20040C Series device). • Built-in adjustment-free low-pass filter. • Provides low-noise data communication. 1.0 0.4 15 0.25 0.1 (2.25) • Transmitter block — D/A converter (3-bit) — Low-pass filter (for EMI prevention) — Output driver • Receiver block — Receiver amplifier — Noise removal low-pass filter (for the received signal) — Comparator (used for wave shaping) 2.45max (0.6) SANYO: MFP30SD Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft’s control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications. SANYO assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO products described or contained herein. SANYO Electric Co.,Ltd. Semiconductor Company TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN 51801RM (OT) No. 6955-1/4 LA2351M Specifications Maximum Ratings at Ta = 25°C Parameter Symbol Maximum supply voltage Allowable power dissipation Conditions Ratings Unit VCC max With no input signal 7.0 V Pd max Ta ≤ 85°C Mounted on a printed circuit board (46.2 × 25.7 × 1.6 mm3, glass epoxy) 500 mW Operating temperature Topr –40 to +85 °C Storage temperature Tstg –55 to +150 °C Recommended Operating Conditions at Ta = 25°C Parameter Symbol Recommended supply voltage VCC Operating supply voltage range VCCOP Vol D/A converter input Transmission control input Conditions Ratings min typ Unit max 5.0 4.75 Low-level input Voh High-level input Vol Low-level input Voh High-level input 0 2.4 V 5.25 V 0.5 V 3.3 V 0.5 V 2.4 V Low-pass filter input amplitude Vlpfi 0.45 0.55 Vpp Output driver input amplitude Vdrvi 0.45 0.55 Vpp Receiver amplifier input signal amplitude range (differential) Vrxi 15 75 0 3.5 V 0.8 1.2 Vpp Comparator input voltage range Vcpdci Comparator input signal amplitude Vcpi mVpp Operating Characteristics at Ta = 25°C, VCC = 5 V Parameter Symbol Quiescent current Conditions Icco When not transmitting Vdao The deviation with respect to 0.5 V for (111) - (001). Output attenuation Insertion loss Ratings min typ Unit max 50 70 mA –1 0 1 dB Vlpfo(9M) The attenuation of a 9 MHz signal with respect to a 1 MHz signal. 2.5 3 3.5 dB Vlpfo(1M) f = 1 MHz –1 0 1 dB 0 2 3 –1.5 0 1.5 D/A converter output level Low-pass filter Output driver Output attenuation The attenuation of a 15 MHz signal with Vtxo(15M) respect to a 1MHz signal. Differential amplification Vtxo(1M) f = 1 MHz Receiver amplifier + noise rejection low-pass filter Amplification Vnfo(1M) f = 1 MHz 25 dB Frequency characteristics The Frequency characteristics of a 15 MHz Vnfo(15M) signal with respect to a 1 MHz signal. –3 dB Comparator Low-level output amplitude Vcpdl 0.2 0.4 0.6 V High-level output amplitude Vcpdh 3.9 4.2 4.3 V No. 6955-2/4 LA2351M Pin Functions Pin No. Pin 1 VCC2 Function Comparator block power supply Description Note 5V 2 CPD2 Comparator inverted output Vol = 0.4 V, Voh = 4.2 V (Maximum voltage: VCC2) 3 CPD1 Comparator noninverted output Vol = 0.4 V, Voh = 4.2 V (Maximum voltage: VCC2) 4 GND2 Comparator block ground Dedicated ground for the comparator block 5 CP1 Comparator input (+) 6 NFO Noise rejection filter output 7 CP2 Comparator input (-) 8 GND Ground System ground 9 FCC1 Transmission rate setting Low: 5 Mbps, High: 7.5 Mbps 10 BIASC Comparator bias Connect to ground through a capacitor 11 FADJ1 Noise rejection low-pass filter cutoff frequency adjustment Adjusted with a resistor to ground Standard setting: Open 12 FADJ2 Low-pass filter cutoff frequency adjustment Adjusted with a resistor to ground Standard setting: Open Receiver amplifier amplification adjustment Adjusted with a resistor to ground (capacitor coupled ground) Standard setting: 0 Ω 13 GCNT 14 RXI2 Reception signal inverting input 15 RXI1 Reception signal noninverting input 16 BIAS2 Bias voltage 17 BIAS1 Bias voltage 18 TXO2 Transmission signal noninverted output 19 TXO1 Transmission signal inverted output 20 NC2 Unused 21 NC1 Unused 22 DRVI Output driver input 23 LPFO Low-pass filter output 24 VCC1 Power supply +5.0 V ± 5% 25 /TXEN Transmit/receive switching Low: transmit, High: receive (Vol = 0.5 V, Voh = 2.4 V) 26 LPFI Low-pass filter input 27 DAO D/A converter output 0.5 Vpp ± 1dB 28 TXI2 D/A converter input (MSB) Vol = 0.5 V, Voh = 2.4 V 29 TXI1 D/A converter input Vol = 0.5 V, Voh = 2.4 V 30 TXI0 D/A converter input (LSB) Vol = 0.5 V, Voh = 2.4 V No. 6955-3/4 LA2351M Test Circuit VCC DAC 0.1µ RADO TXI0 TXI1 TXI2 30 29 28 0.1µ 0.1µ 3.3µ 0.1µ 0.1µ TXEN 27 26 VCC 25 DAC 0.1µ 0.1µ 24 23 22 21 20 19 18 17 16 14 15 LPF Driver Amp Receiver Amp Noise Filter Comparater VCC 1 2 3 4 5 6 7 8 9 10 11 12 13 2.2k 3.3µ 0.1µ 0.1µ OUTPUT VCC COMP. GND 0.1µ 0.1µ 33k 3.3 V DATA OUT 0.1µ GND CUT_OFF CONTRO COMP BIAS VCC 0.1µ 5.6k 330 330 5.6k 0.1µ 2.2k Specifications of any and all SANYO products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer’s products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer’s products or equipment. SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO products (including technical data, services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining the export license from the authorities concerned in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of SANYO Electric Co., Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the “Delivery Specification” for the SANYO product that you intend to use. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of May, 2001. Specifications and information herein are subject to change without notice. PS No. 6955-4/4